Airtightness testing of very large buildings: a case study

In the airtightness testing industry, the upper limit for large buildings to be tested was 5000 m2. The feasibility of testing very large buildings, over 5000 m2, with a steady state fan technique has been questioned and the authors of that paper have tested and proved the technical feasibility of this equipment. The development, calibration and application of a 2 m diameter fan pressurissation system is demonstrated in this paper.